discourse/app/models/color_scheme.rb

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require_dependency 'distributed_cache'
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class ColorScheme < ActiveRecord::Base
CUSTOM_SCHEMES = {
dark: {
"primary" => 'dddddd',
"secondary" => '222222',
"tertiary" => '0f82af',
"quaternary" => 'c14924',
"header_background" => '111111',
"header_primary" => '333333',
"highlight" => 'a87137',
"danger" => 'e45735',
"success" => '1ca551',
"love" => 'fa6c8d'
}
}
def self.base_color_scheme_colors
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base_with_hash = {}
base_colors.each do |name, color|
base_with_hash[name] = "#{color}"
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end
list = [
{ id: 'default', colors: base_with_hash }
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]
CUSTOM_SCHEMES.each do |k,v|
list.push({id: k.to_s, colors: v})
end
list
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end
def self.hex_cache
@hex_cache ||= DistributedCache.new("scheme_hex_for_name")
end
attr_accessor :is_base
has_many :color_scheme_colors, -> { order('id ASC') }, dependent: :destroy
alias_method :colors, :color_scheme_colors
before_save do
if self.id
self.version += 1
end
end
after_save :publish_discourse_stylesheet
after_save :dump_hex_cache
after_destroy :dump_hex_cache
belongs_to :theme
validates_associated :color_scheme_colors
BASE_COLORS_FILE = "#{Rails.root}/app/assets/stylesheets/common/foundation/colors.scss"
@mutex = Mutex.new
def self.base_colors
@mutex.synchronize do
return @base_colors if @base_colors
@base_colors = {}
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File.readlines(BASE_COLORS_FILE).each do |line|
matches = /\$([\w]+):\s*#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})(?:[;]|\s)/.match(line.strip)
@base_colors[matches[1]] = matches[2] if matches
end
end
@base_colors
end
def self.base_color_schemes
base_color_scheme_colors.map do |hash|
scheme = new(name: I18n.t("color_schemes.#{hash[:id]}"), base_scheme_id: hash[:id])
scheme.colors = hash[:colors].map{|k,v| {name: k.to_s, hex: v.sub("#","")}}
scheme.is_base = true
scheme
end
end
def self.base
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return @base_color_scheme if @base_color_scheme
@base_color_scheme = new(name: I18n.t('color_schemes.base_theme_name'))
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@base_color_scheme.colors = base_colors.map { |name, hex| {name: name, hex: hex} }
@base_color_scheme.is_base = true
@base_color_scheme
end
# create_from_base will create a new ColorScheme that overrides Discourse's base color scheme with the given colors.
def self.create_from_base(params)
new_color_scheme = new(name: params[:name])
new_color_scheme.via_wizard = true if params[:via_wizard]
new_color_scheme.base_scheme_id = params[:base_scheme_id]
colors = CUSTOM_SCHEMES[params[:base_scheme_id].to_sym]&.map do |name, hex|
{name: name, hex: hex}
end if params[:base_scheme_id]
colors ||= base.colors_hashes
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# Override base values
params[:colors].each do |name, hex|
c = colors.find {|x| x[:name].to_s == name.to_s}
c[:hex] = hex
end if params[:colors]
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new_color_scheme.colors = colors
new_color_scheme.save
new_color_scheme
end
def self.lookup_hex_for_name(name)
enabled_color_scheme = Theme.where(key: SiteSetting.default_theme_key).first&.color_scheme
(enabled_color_scheme || base).colors.find {|c| c.name == name }.try(:hex) || :nil
end
def self.hex_for_name(name)
hex_cache[name] ||= lookup_hex_for_name(name)
hex_cache[name] == :nil ? nil : hex_cache[name]
end
def colors=(arr)
@colors_by_name = nil
arr.each do |c|
self.color_scheme_colors << ColorSchemeColor.new( name: c[:name], hex: c[:hex] )
end
end
def colors_by_name
@colors_by_name ||= self.colors.inject({}) { |sum,c| sum[c.name] = c; sum; }
end
def clear_colors_cache
@colors_by_name = nil
end
def colors_hashes
color_scheme_colors.map do |c|
{name: c.name, hex: c.hex}
end
end
def base_colors
colors = nil
if base_scheme_id && base_scheme_id != "default"
colors = CUSTOM_SCHEMES[base_scheme_id.to_sym]
end
colors || ColorScheme.base_colors
end
def resolved_colors
resolved = ColorScheme.base_colors.dup
if base_scheme_id && base_scheme_id != "default"
if scheme = CUSTOM_SCHEMES[base_scheme_id.to_sym]
scheme.each do |name, value|
resolved[name] = value
end
end
end
colors.each do |c|
resolved[c.name] = c.hex
end
resolved
end
def publish_discourse_stylesheet
if self.id
themes = Theme.where(color_scheme_id: self.id).to_a
if themes.present?
Stylesheet::Manager.cache.clear
themes.each do |theme|
theme.notify_scheme_change(_clear_manager_cache = false)
end
end
end
end
def dump_hex_cache
self.class.hex_cache.clear
end
end
# == Schema Information
#
# Table name: color_schemes
#
# id :integer not null, primary key
# name :string not null
# version :integer default(1), not null
# created_at :datetime not null
# updated_at :datetime not null
# via_wizard :boolean default(FALSE), not null
# base_scheme_id :string
# theme_id :integer
#